N.Y. Comp. Codes R. & Regs. tit. 10 § 5-1.52
TABLE 5-DISTRIBUTION SYSTEM TURBIDITY MAXIMUM CONTAMINANT LEVEL DETERMINATION
| Contaminant | MCL | Determination of MCL violation |
| Distribution point turbidity | 5 NTU | A violation occurs when the monthly average of the results of all distribution samples collected in any calendar month exceeds the MCL rounded off to the nearest whole number. |
Table 6. Microbiological Contaminants Maximum Contaminant Level (MCL)/Treatment Technique Trigger (TTT)/ Treatment Technique Violation (TTV) Determination1
Contaminant/ Trigger/ Violation | Sample Location | MCL or TTT or TTV | Performance Standard | Determination of MCL/TTV and TTT10 |
Total coliform2 | Distribution Sample Sites | TTT3 | No positive sample4, 5 | A Level 1 TTT occurs at systems collecting 40 or more samples per month when more than 5.0 percent of the samples are total coliform positive.11 |
TTT3 | A Level 1 TTT occurs at systems collecting less than 40 samples per month when two or more samples are total coliform positive.11 | |||
TTT3 | A Level 1 TTT occurs at any system that fails to collect every required repeat sample after any single total coliform positive sample.11 | |||
TTT6 | A Level 2 TTT occurs at any system that has a second Level 1 trigger within a rolling 12-Level 1 TTT were total coliform positive and has established that the system has corrected the problem.11 | |||
Escherichia coli (E. Coli) | MCL/TTT4, 6 | No positive sample5, 7 | An MCL violation and Level 2 TTT occurs when a total coliform sample is positive for E. coli and a repeat total coliform sample is positive.13 | |
MCL/TTT4, 6 | No positive sample5, 7 | An MCL violation and Level 2 TTT occurs when a total coliform sample is positive for total coliform but negative for E. coli and a repeat total coliform sample is positive for E. coli.13 | ||
MCL/TTT4, 6 | An MCL violation and Level 2 TTT occurs when a total coliform sample is positive for total coliform but negative for E. coli and a repeat total coliform positive sample is not analyzed for E. coli.13 | |||
MCL/TTT4, 6 | An MCL violation occurs when a system fails to collect every required repeat sample after any E. coli positive routine sample. | |||
Fecal indicator: E. coli, and/or enterococci, and/or coliphage8 | Untreated Water from a Ground Water Source | TTV | No fecal indicator in samples collected from raw source water from a ground9w10ater source. , | A TTV occurs when a raw water sample is positive for the fecal indicator contaminant and system does not provide and document, through process compliance monitoring, 4-log virus treatment during peak flow at first customer. If repeat sampling of the raw water is directed by the State and all additional samples are negative for fecal indicator, there is no TTV.9, 13 |
Other trigger or violation | TTV4 | A TTV occurs when a system exceeds a TTT and then fails to conduct the required assessment or corrective actions.12 | ||
TTV4 | A TTV occurs when a seasonal system fails to complete a State-approved start-up procedure prior to serving water to the public.14 |
1All samples collected in accordance with Table 11 footnotes 1 and 2 and Table 11B of this section and samples collected in accordance with subdivision 5-1.51(g) of this Subpart shall be included in determining compliance with the MCL, TTT, and/or TTV unless any of the samples have been invalidated by the State. In accordance with 40 CFR 141.852(a)(2) systems need only determine the presence or absence of total coliforms and E. coli; a determination of density is not required.
2Total coliform method additions or modifications to approved methods.
For total coliform (TC) samples collected from untreated surface water or GWUDI sources, the time from sample collection to initiation of analysis may not exceed 8 hours and the samples must be held below 10 degrees C during transit to the laboratory. For other TC samples, the time from collection to initiation of analysis may not exceed 30 hours. Systems are encouraged, but not required, to hold TC samples below 10 degrees C during transit.
If the Total Coliform Fermentation Technique using standard methods 9221A or B is used, and if inverted tubes are used to detect gas production, the media should cover these tubes at least one half to two-thirds after the sample is added. Also, no requirement exists to run the completed phase on 10 percent of all TC-positive confirmed tubes. Additionally, lactose broth, as commercially available, may be used in lieu of lauryl tryptose broth, if the system conducts at least 25 parallel tests between this medium and lauryl tryptose broth using the water normally tested, and this comparison demonstrates that the false-positive rate and falsenegative rate for TC, using lactose broth, is less than 10 percent. If Membrane Filter Technique Standard Methods 9222A, B, and optionally C are used, MI agar also may be used. Verification of colonies is not required.
* If the Standard Methods Presence-Absence (P-A) Coliform Test, 9221D is used, six-times formulation strength may be used if the medium is filter-sterilized rather than autoclaved.
* If the Total Coliform Membrane Filter Technique, Standard Methods 9222 A, B, C is used, MI agar also may be used. Verification of colonies is not required.
* For any TC testing it is strongly recommended that laboratories evaluate the false-positive and negative rates for the method(s) they use for monitoring TC. Laboratories are also encouraged to establish false-positive and false-negative rates within their own laboratory and sample matrix (drinking water or source water) with the intent that if the method they choose has an unacceptable false-positive or negative rate, another method can be used. It is suggested that laboratories perform these studies on a minimum of 5% of all TC-positive samples, except for those methods where verification/ confirmation is already required. Methods for establishing false-positive and negative-rates may be based on lactose fermentation, the rapid test for [BETA]-galactosidase and cytochrome oxidase, multi-test identification systems, or equivalent confirmation tests. False-positive and false-negative information is often available in published studies and/or from the manufacturer(s).
3The system must complete a Level 1 assessment as soon as practical after exceeding a Level 1 TTT. The system must submit the completed Level 1 assessment form to the State within 30 days after the system learns that it has exceeded a trigger. Corrective actions shall be addressed in accordance with section 5-1.71(e) of this Subpart.
4See Table 13 for public notification requirements.
5If any total coliform or E. Coli sample is positive, repeat samples must be collected in accordance with Table 11B of this section.
6A Level 2 assessment must be completed within 30 days after the system learns that it has exceeded a trigger. Corrective actions shall be addressed in accordance with section 5-1.71(e) of this Subpart.
7For notification purposes, an E. coli MCL violation in the distribution system is a public health hazard requiring Tier 1 notification. At a ground water system, Tier 1 notification is required after initial detection of E. coli or other fecal indicator in raw source water, if the system does not provide 4-log virus treatment and process compliance monitoring, even if not confirmed with additional sampling.
8For any fecal indicator sample collected as described in section 5-1.52, Table 6, the time from sample collection to initiation of analysis may not exceed 30 hours. The system is encouraged but is not required to hold samples below 10°C during transit.
9If raw water source sample is fecal indicator positive, the water system, in consultation with the State, may collect an additional 5 samples within 24 hours at each source that tested fecal indicator positive. If none of the additional samples are fecal indicator positive, then there is no TTV. Note that Tier 1 notification must be made after the initial raw water fecal indicator positive sample, even if it is not confirmed with additional sampling.
10Failure to take every required routine or additional routine sample in a compliance period is a monitoring violation.
11Failure to analyze for E. coli following a total coliform positive routine sample is a monitoring violation.
12Failure to submit a monitoring report or completed assessment form after a system properly conducts monitoring or assessment in a timely manner is a reporting violation.
13Failure to notify the State following an E. coli-positive sample as required by 5-1.52 Table 13 and 5-1.77(a) of this Subpart in a timely manner is a reporting violation.
14Failure to submit certification of completion of State approved start-up procedure by a seasonal system is a reporting violation.
Footnote 4 of section 5-1.52 Table 11A is amended to read as follows:
4Samples must be taken and analyzed every day the system serves water to the public and the turbidity of the raw water exceeds 1 NTU. The samples count toward the weekly sampling requirement.
TABLE 8A-INORGANIC CHEMICALS AND PHYSICAL CHARACTERISTICS MINIMUM MONITORING REQUIREMENTS FOR ASBESTOS
| Initial Frequency by Source Type 5Contaminant | Type ofwater system | Groundwater only | Surface only orsurface and groundwater | Repeat samplingand compliance |
| Asbestos1 | Community and NTNC | One sample at entry point by 12/31/952,3,4 | One sample at entry point by 12/31/952,3,4 | If GT MCL, one sample quarterly6,7 |
| If LT MCL, one sample every nine years |
GT - Greater Than LT - Less Than
1 If a system is not vulnerable to asbestos contamination, either at its source or due to corrosion of asbestos cement pipe, it is not required to monitor if granted a waiver by the State. The waiver must be renewed by the State every nine years. The basis for a waiver must include the following:
2 If asbestos monitoring data collected after January 1, 1990 are consistent with the requirements of this table, the State may allow systems to use that data to satisfy the initial monitoring requirement beginning January 1, 1993.
3 If a system is vulnerable to asbestos contamination due to source water and corrosion of asbestos cement pipe or solely to corrosion of asbestos cement pipe, it shall take one sample at a tap served by asbestos cement pipe and under conditions where asbestos contamination is most likely to occur.
4 If a system is vulnerable to asbestos contamination due to source water only, monitoring shall be conducted as follows: Groundwater -Collect a minimum of one sample at each entry point to the distribution system representative of each well after treatment. Surface water - Collect a minimum of one sample at each entry point to the distribution system after any application of treatment or in the distribution system at a point which is representative of each source after treatment.
5 For both types of water sources the system shall take each sample at the same sampling point unless conditions make another sampling point more representative of each source or treatment plant. If a system draws water from more than one source and the sources are combined before distribution, the system must sample at an entry point to the distribution system during periods of normal operating conditions when water is representative of all sources.
6 A system which exceeds the MCL for asbestos shall monitor quarterly beginning in the next quarter after the violation occurred.
7 The State may decrease the quarterly monitoring requirement to the initial sampling requirement provided that the State has determined that the system is reliably and consistently below the MCL on the basis of a minimum of two quarterly groundwater samples and a minimum of four quarterly samples for surface water.
TABLE 8C-INORGANIC CHEMICALS AND PHYSICAL CHARACTERISTICS MINIMUM MONITORING REQUIREMENTS-NITRATES, NITRITES
| Initial Frequency by Source Type1,6Contaminant | Type of water system | Groundwater only | Surface only orsurface and groundwater | Accelerated sampling7 |
| Nitrate | Community and noncommunity2 | One sample per entry point per year | One sample per entry point quarterly | For groundwater: If equal to or GT 50 percent MCL, quarterly for one year3 |
| For surface water: If LT 50 percent MCL, one sample per year3,4 | ||||
| Nitrate | Community and noncommunity | One sample per entry point by 12/31/95 | One sample per entry point by 12/31/95 | If equal to or GT 50 percent MCL, repeat quarterly for at least one year3,4 |
| If LT 50 percent MCL sample frequency at State discretion.5 |
GT - Greater Than
LT - Less Than
1 The State may require, or the water system may request, more frequent monitoring frequencies than is minimally required. The State, at its discretion may require confirmation samples for positive and negative results.
2 Noncommunity water systems must sample annually beginning 1/1/93 regardless of the water source.
3 The frequency may be reduced to annual if the State determines the system's contaminant concentration is consistently and reliably less than the MCL and annual samples are collected during the quarter(s) having the highest analytical results.
4 A surface water shall return to quarterly monitoring if any one sample is GT 50 percent of MCL.
5 State discretion shall mean requiring monitoring when the State has reason to believe the MCL has been violated, the potential exists for an MCL violation or the contaminant may present a risk to public health.
6 For both types of water sources the system shall take each sample at the same sampling point unless conditions make another sampling point more representative of each source or treatment plant. If a system draws water from more than one source and the sources are combined before distribution, the system must sample at an entry point to the distribution system during periods of normal operating conditions when water is representative of all sources. The average of the initial and confirmation sample contaminant concentration at each sampling point shall be used to determine compliance with the MCL.
TABLE 8D-INORGANIC CHEMICALS AND PHYSICAL CHARACTERISTICS MINIMUM MONITORING REQUIREMENTS-OTHER CHEMICALS
| Initial Frequency by Source Type | ||||
| Contaminant | Type of water system | Groundwater only | Surface only or surface and groundwater | Repeat sampling and compliance |
| Chloride | Community | State discretion2 | State discretion2 | State discretion2 |
| Iron | and NTNC | |||
| Manganese | ||||
| Silver | ||||
| Sodium1 | ||||
| Sulfate | ||||
| Zinc | ||||
| Color | ||||
| Odor | ||||
1 All community systems with sodium levels exceeding 20 mg/l will be required to sample for sodium analysis.
2 State discretion shall mean requiring monitoring when the State has reason to believe the MCL has been violated, the potential exists for an MCL violation or the contaminant may present a risk to public health.
TABLE 9D-ORGANIC CHEMICALS-POCs MINIMUM MONITORING REQUIREMENTS
| Contaminant | Specific contaminants for analysis | |
| POC's | benzene1 | 1,1-dichloropropene |
| bromobenzene | cis-1,3-dichloropropene | |
| bromochloromethane | trans-1,3-dichloropropene | |
| bromomethane | ethylbenzene1 | |
| n-butylenzene | hexachlorobutadiene | |
| sec-butylbenzene | isopropylbenzene | |
| tert-butylbenzene | p-isopropyltoluene | |
| carbon tetrachloride1 | methylene chloride1 | |
| chlorobenzene | n-propylbenzene | |
| chloroethane | styrene1 | |
| chloromethane | 1,1,1,2-tetrachloroethane | |
| 2-chlorotoluene | 1,1,2,2-tetrachloroethane | |
| 4-chlorotoluene | tetrachloroethene1 | |
| didromomethane | toluene1 | |
| 1,2-dichlorobenzene1 | 1,2,3-trichlorobenzene | |
| 1,3-dichlorobenzene | 1,2,4-trichlorobenzene1 | |
| 1,4-dichlorobenzene1 | 1,1,1-trichloroethane1 | |
| dichlorodifluoromethane | 1,1,2-trichloroethane1 | |
| 1,1-dichioroethane | trichloroethene1 | |
| 1,2-dichloroethane1 | trichlorofluoromethane | |
| 1,1-dichlorethane1 | 1,2,3-trichloropropane | |
| cis-1,2-dichloroethene1 | 1,2,4-trimethylbenzene | |
| trans-1,2-dichloroethene1 | 1,3,5-trimethylbenzene | |
| 1,2-dichloropropane1 | m-xylene1 | |
| 1,3-dichloropropane | o-xylene1 | |
| 2,2-dichloropropane | p-xylene1 |
1 Notification must contain mandatory health effect language.
TABLE 10A-TURBIDITY MINIMUM MONITORING REQUIREMENTS 1
| Source type | |||
| Contaminant | Type of water system | Groundwater | Surface water1 |
| Filtered water turbidity | Community and noncommunity | Not applicable | Continuous monitoring for composite filter effluent and individual filters.2,3,4 ,5 |
| Raw water turbidity | Unfiltered surface: community and noncommunity | Not applicable | Every four hours or continuous monitoring5 |
| Distribution point turbidity | Community | State discretion7 | Five distribution samples each week unless otherwise determined by the State. No two samples may be obtained on the same day and no two samples are to be collected from the same distribution point during the same week. |
| Noncommunity | State discretion7 | State discretion6 |
1 Surface water sources or groundwater sources directly influenced by surface water.
2 Effective January 1, 2002 systems serving 10,000 or more people must record the results of individual filter monitoring every 15 minutes, and combined filter effluent every four hours. Effective January 14, 2005 systems serving fewer than 10,000 persons must record the results of individual filter monitoring every 15 minutes, and combined filter effluent every four hours. Until January 14, 2005, systems serving fewer then 10,000 persons must continuously monitor the composite filter effluent turbidity, or record the turbidity every four hours. The State may allow systems with two filters to monitor the combined filter effluent continuously (recording every 15 minutes) in lieu of monitoring individual filter turbidity. Results of individual filter monitoring must be maintained for at least three years.
3 If there is a failure in the continuous turbidity monitoring equipment, the system must conduct grab sampling every four hours instead of continuous monitoring, but for no more than five working days following the failure of the equipment.
4 For systems using slow sand filtration or filtration treatment, other than conventional treatment, direct filtration or D.E. filtration, the State may reduce sampling frequency to once per day if it determines that less frequent monitoring is sufficient to indicate effective filtration performance.
5 If a system uses continuous monitoring, it must use the turbidity values recorded every four hours to determine if an MCL violation occurs, unless the State has approved in writing a different time interval.
6 State discretion shall mean requiring monitoring when the State has reason to believe the MCL has been violated, the potential exists for an MCL violation or the contaminant may present a risk to public health.
TABLE 11-MICROBIOLOGICAL MINIMUM MONITORING REQUIREMENTS (Refer to Table 11B following any positive samples)1,2,3 ,4
Contaminant | Type of Water System | Number of Routine Samples Based on Population | |||
Population Served | Minimum Number of Samples per Month4 | Population Served | Minimum Number of Samples per Month4 | ||
Total coliform in distribution system5 | Community | Up to 1,0006,7 | 1 | 59,001 to 70,000 | 70 |
1,001 to 2,500 | 2 | 70,001 to 83,000 | 80 | ||
2,501 to 3,300 | 3 | 83,001 to 96,000 | 90 | ||
3,301 to 4,100 | 4 | 96,001 to 130,000 | 100 | ||
4,101 to 4,900 | 5 | 130,001 to 220,000 | 120 | ||
4,901 to 5,800 | 6 | 220,001 to 320,000 | 150 | ||
5,801 to 6,700 | 7 | 320,001 to 450,000 | 180 | ||
6,701 to 7,600 | 8 | 450,001 to 600,000 | 210 | ||
7,601 to 8,500 | 9 | 600,001 to 780,000 | 240 | ||
8,501 to 12,900 | 10 | 780,001 to 970,000 | 270 | ||
12,901 to 17,200 | 15 | 970,001 to 1,230,000 | 300 | ||
17,201 to 21,500 | 20 | 1,230,001 to 1,520,000 | 330 | ||
21,501 to 25,000 | 25 | 1,520,001 to 1,850,000 | 360 | ||
25,001 to 33,000 | 30 | 1,850,001 to 2,270,000 | 390 | ||
33,001 to 41,000 | 40 | 2,270,001 to 3,020,000 | 420 | ||
41,001 to 50,000 | 50 | 3,020,001 to 3,960,000 | 450 | ||
50,001 to 59,000 | 60 | 3,960,001 or more | 480 | ||
Noncommunity using surface water or groundwater directly influenced by surface water | All | Same as community | |||
Noncommunity using only groundwater not directly influenced by surface water9 | <=1,000 | Quarterly8,9 | |||
>1,000 | Same as community | ||||
Seasonal | All | Monthly9 | |||
Escherichia coli(E. coli) | Community and Noncommunity | All | Any routine or repeat samples that are Coliform positive must be analyzed for E. coli.4,10 | ||
Fecal Indicator in Raw Source Water10 | All ground water systems unless providing 4-log virus treatment and process compliance monitoring | All | State discretion11 | ||
1. Public water supply systems must collect total coliform samples at sites that are representative of water throughout the distribution system and throughout the reporting period, in accordance with a written monitoring plan which is subject to State review and revision as described in section 5-1.51(c) of this Subpart. A public water system that uses only groundwater and serves 4,900 or fewer people may collect all required samples on a single day if they are taken from different sites.
2. Public water systems using surface water or groundwater directly influenced by surface water, and which do not provide filtration, must collect and analyze at least one sample for total coliforms near the first service connection each day the turbidity level of the raw water exceeds 1.49 NTU. This sample shall be collected within 24 hours. Results of this sample must be included in determining compliance with the MCLs and TTTs in Table 6 of this section.
3. Samples taken to determine disinfection practices after pipe repair, replacement, or similar activity are not to be used for determining compliance with the MCLs or TTTs in Table 6 of this section.
4. See Table 11B for repeat sampling requirements following any total coliform or E. Coli positive samples.
5. If chlorine or chloramines are used as the disinfectant, a chlorine residual determination shall be made at the same time and location that the sample is collected for total coliform analysis. Monitoring for heterotrophic bacteria may be substituted for free chlorine residuals. The State may allow a public water system that uses both:
6. The State may, in writing, reduce the monitoring frequency to quarterly for a community water system serving 1,000 or fewer persons and using ground water only if the system is in compliance with 10 NYCRR Subpart 5-4; has a clean compliance history for a minimum of 12-months; is free of sanitary defects; and has a protected water source. The system must meet at least one of the following criteria: an annual site visit by the State or State-approved party that is equivalent to a Level 2 assessment and correction of all identified sanitary defects; cross connection control, as approved by the State; continuous disinfection entering the distribution system and a residual in the distribution system in accordance with criteria specified by the State; or demonstration of maintenance of at least a 4-log removal or inactivation of viruses. Systems that have been granted a disinfection waiver are not eligible for reduced monitoring frequency.
7. A community water system on quarterly monitoring must begin monthly monitoring if it meets any of the following conditions: a Level 2 assessment is triggered; two Level 1 assessments in a rolling 12-month period are triggered; an E. coli MCL violation; a coliform TTV; or two total coliform monitoring violations in a rolling 12-month period. Monthly monitoring must begin in the month following the event.
8. A noncommunity water system on quarterly monitoring must begin monthly monitoring if it meets any of the following conditions: a Level 2 assessment is triggered; two Level 1 assessments in a rolling 12-month period are triggered; an E. coli MCL violation; a coliform TTV; two total coliform monitoring violations; or one total coliform monitoring violation and one Level 1 assessment in a rolling 12-month period. Monthly monitoring must begin in the month following the event.
9. A noncommunity water system may return to quarterly monitoring if they meet the following criteria: within the last 12 months, the system must have a completed sanitary survey or Level 2 assessment, be free of sanitary defects, have a protected water source; and the system must have a clean compliance history for a minimum of 12 months.
10. Fecal indicators include E. coli, enterococci, and coliphage. Only E. coli testing will be required, unless otherwise directed by the State.
11. State discretion shall mean that monitoring is required when the State has reason to believe the MCL or TT has been violated, the potential exists for an MCL violation or TTV; or the contaminant may present a risk to public health.
TABLE 11A-MICROBIOLOGICAL/FILTRATION AVOIDANCE CRITERIA MINIMUM MONITORING REQUIREMENTS1
| Contaminant2 | Type of water system | Population served: | Minimum number of samples per week3,4 |
| Raw water fecal or total coliform | Community and noncommunity | Up to 500 501 to 3,300 | 1 2 |
| 3,301 to 10,000 | 3 | ||
| 10,001 to 25,000 | 4 | ||
| 25,001 or more | 5 |
1 The monitoring requirement applies to surface water sources and groundwater sources directly influenced by surface water.
2 Either fecal or total coliform density measurements are acceptable. If both analyses are performed, the fecal coliform results will take precedence.
3 Monitoring sampling must be performed on separate days.
4 Samples must be taken and analyzed every day the system serves water to the public and the turbidity of the raw water exceeds 1.49 NTU. The samples count toward the weekly sampling requirement.
TABLE 11B-REPEAT MICROBIOGICAL SAMPLING REQUIREMENTS FOLLOWING TOTAL COLIFORM POSITIVE AND/OR FECAL INDICATOR POSITIVE SAMPLE(S)
Type of Positive Sample | Type of Water System/Source | System Size | Number of Repeat Samples Required Within 24 Hours of Notification | Sampling Location | Required Action for Positive Repeat Samples |
Routine total coliform sample(s) from distribution system | Surface water, GWUDI, or ground water performing 4-log virus treatment and process compliance monitoring | More than one service connection | Three distribution system samples | The same sampling site where the original coliform-positive sample was collected, one sample within five service connections upstream, one sample within five service connections downstream in accordance with a state approved sampling plan. | Distribution sampling must be repeated until total coliform is not detected in repeat samples, or it is determined that a treatment technique has been triggered or an MCL has been violated.2,3 |
One service connection | One distribution system sample4 | Original sampling location | |||
Ground water system or ground water source not providing (or not documenting) 4-log virus treatment5 | Population >1,000 | Three distribution system samples and one source water sample from each source collected in accordance with a State-approved sampling plan6 | The same distribution system sampling site where the original coliform-positive sample was collected, one sample within five service connections upstream, one sample within five service connections downstream. An additional sample must be collected from each raw water source or according to State approved sampling plan.6,7 | Distribution sampling must be repeated until total coliform is not detected in repeat samples, or it is determined that a treatment technique has been triggered or an MCL has been violated.2,3 | |
Population <=1,000 and more than one service connection | Three distribution system samples and one source water sample from each source collected in accordance with a State-approved sampling plan. 5,8 | The same distribution system sampling site where the original coliform-positive sample was collected, one sample within five service connections upstream, and one sample within five service connections downstream. An additional sample must be collected from each raw water source or according to State approved sampling plan.6,7,8 | |||
One service connection | One distribution system sample and source water sample(s) in accordance with a State-approved sampling plan4,6,8 | Original sampling location. An additional sample must be collected from each raw water source or according to State approved sampling plan.6,7,8 | |||
Wholesale System of any size | After notification by consecutive system of total coliform-positive sample6,7,9, 11 | Collect one raw water sample at each source or in accordance with a State-approved sampling plan.6,7, 9 | As directed by State10 | ||
Source water sample(s) fecal indicator positive7,10 | Ground water system or ground water source not providing or not documenting 4-log virus treatment | All | Five raw water samples for fecal indicator or immediate corrective action as directed by State 6, 9, 11 | Fecal indicator sampling from source or sources with initial fecal indicator positive samples6,7 | As directed by State10,11 |
1. After any total coliform positive sample from the distribution system, the system must collect repeat samples on the same day and within 24 hours of being notified.
2. The month following a total coliform positive sample, systems collecting samples quarterly must collect a minimum of three routine distribution system samples. The State may waive, in writing, the requirement to collect three routine samples the following month the system provides water to the public, if the State carries out an onsite visit before the end of the following month and the State determines why the sample was total coliform positive and establishes that the system has corrected the problem. The State cannot waive the requirement to collect three routine samples solely on the basis that all the repeat samples were total coliform negative. Before the end of the following month the system serves water to the public, at least one routine sample to determine compliance with the MCLs and TTTs must be collected by the system as required in Table 11.
3. Results of all routine and repeat microbiological samples not invalidated by the State must be used to determine whether a coliform TTT specified in Table 6 has been exceeded.
4. The State may allow a system with a single service connection to collect the required set of repeat samples over a three-day period or to collect a larger volume repeat sample(s) in one or two more sample containers of any size, as long as the total volume collect is at least 300 mL. If E. coli is used as the fecal indicator at a ground water system with a single well, a single sample of two (2) times the minimum sample volume or two (2) bottles of minimum required sample volume may be collected consecutively from the tap and the third sample collected from the raw water source. This source water sample result must be used to determine compliance with all Table 6 requirements.
5. If a consecutive system purchasing (or otherwise obtaining) ground water from a wholesale system has a total coliform-positive sample from the distribution system, the system must notify the wholesale system and collect distribution system repeat samples as specified in Table 11B within 24 hours. The wholesale system must collect raw source water sample(s) unless the system provides 4-log virus treatment at peak flow before or at the first customer as confirmed through process compliance monitoring.
6. Sampling plan requirements are given in section 5-1.51(c) of this Subpart.
7. Fecal indicators include E. coli, enterococci and coliphage. Sampling for fecal indicators other than E.coli is at State discretion.
8. A system with a single well or a ground water source serving 1,000 or fewer persons may collect a single raw water sample to serve as both a distribution repeat sample to replace the upstream location sample and a raw water sample taken following a routine total coliform positive sample, if E. coli is used as the fecal indicator. If this dual-purpose source water sample is collected, the sample result must be used to determine compliance with all Table 6 requirements.
9. Wholesale system source water sampling requirements are in addition to distribution system sampling requirements for consecutive systems.
10. In the event of a fecal indicator positive sample from the raw source water, the state must be notified immediately and may require immediate corrective action. In no case will notification be later than 24 hours as described in section 5-1.78(d)(4) of this Subpart.
11. If a ground water wholesale system does not perform 4-log virus treatment and process compliance monitoring, and has a fecal indicator positive sample from a raw source water, the system must notify any consecutive systems as well as any of its own customers.
TABLE 12-RADIOLOGICAL MINIMUM MONITORING REQUIREMENTS
| Contaminant | Type of water system | Monitoring Requirement1 | |
| Initial | Reduced monitoring2,3 | ||
| Combined radium-226 and radium-228 and gross alpha particle activity | Community | Four consecutive quarterly samples at every entry point before December 31, 2007, 4,5,6 | One sample every nine years at every entry point when monitoring results are below the detection limit.7,8 |
| One sample every six years at every entry point when monitoring results are at or above the detection limit but below half of the MCL.7,8 | |||
| One sample every three years at every entry point when monitoring results are above half of the MCL but at or below the MCL.7,8 | |||
| Noncommunity | Not applicable | ||
| Beta particle and photon radioactivity from manmade radionuclides | Community systems designated by the State as vulnerable9 | Quarterly samples for beta particle and annual samples for tritium and Sr-90, beginning within one quarter after being notified by the State.10,11 | If the gross beta particle activity minus the naturally occurring K-40 beta particle activity at a sampling point has a running annual average (computed quarterly) less than or equal to 50 pCi/L (screening level), the State may reduce the frequency of monitoring at that sampling point to once every 3 years.14,15 |
| Community systems designated by the State as utilizing waters contaminated by effluents from nuclear facilities9 | Quarterly samples for beta emitters and I-131 and annual samples for tritium and Sr-90, beginning within one quarter after being notified by the State.10,11,12,13 | If the gross beta particle activity minus the naturally occurring K-40 beta particle activity at a sampling point has a running annual average (computed quarterly) less than or equal to 15 pCi/L (screening level), the State may reduce the frequency of monitoring at that sampling point to once every 3 years.14,15 | |
1 All radiological samples must be collected at every entry point to distribution system (EPTDS).
2 The State may allow systems to reduce the frequency of monitoring based on initial monitoring or historical results as noted in footnote 4 below.
3 Systems on a reduced monitoring schedule must perform quarterly sampling if a sample result exceeds the MCL.
4 The State may allow historical monitoring data collected between June 2000 and December 8, 2003 for systems with:
5 The State may waive the final two quarters of initial monitoring for a sampling point if the results of the samples from the previous two quarters are below the detection limit.
6 If the average of the initial monitoring results for a sampling point is above the MCL, the system must collect and analyze quarterly samples at the sampling point until the system has results from four consecutive quarters that are at or below the MCL.
7 A gross alpha particle activity measurement may be substituted for the required radium-226 measurement provided that the measured gross alpha particle activity does not exceed 5 pCi/L. A gross alpha particle activity measurement may be substituted for the required uranium measurement provided that the measured gross alpha particle activity does not exceed 15 pCi/L. The gross alpha measurement shall have a confidence interval of 95 % (1.65[SIGMA], where [SIGMA] is the standard deviation of the net counting rate of the sample) for radium-226 and uranium. When a system uses a gross alpha activity measurement in lieu of a radium-226 and/or uranium measurement, the gross alpha particle activity analytical result will be used be determine the future monitoring frequency for radium-226 and/or or uranium. If the gross alpha particle activity result is less than detection, 1/2 the detection limit can be used to substitute to radium-226 and determine compliance for future monitoring frequency.
8 Radium-228 measurement can not be substituted by the gross alpha particle activity result.
9 For systems in the vicinity of a nuclear facility, the State may allow the CWS to utilize environmental surveillance data collected by the nuclear facility in lieu of monitoring the systems entry point(s), where the State determines that such data is applicable.
10Systems already designed by the State must continue to sample until the State reviews and either reaffirms or removes the designation.
11Quarterly monitoring for gross beta particle activity shall be based on the analysis of monthly samples or the analysis of a composite of three monthly samples.
12Annual monitoring for Sr-90 and tritium shall be conducted by means of the analysis of a composite of four consecutive quarterly samples or analysis of four quarterly samples.
13For iodine-131, a composite of five consecutive daily samples shall be analyzed once each quarter. As ordered by the State, more frequent monitoring shall be conducted when iodine-131 is identified in the finished water.
14Systems must collect all samples for beta emitters, tritium and strontium-90 during the reduced monitoring period.
15A system that exceeds the gross beta particle activity minus the naturally occurring potassium-40 beta particle screening level (50 pCi/L for vulnerable systems or 15 pCi/L for systems utilizing waters contaminated by effluents from nuclear facilities), must further analyze the sample for the major radioactive constituents. The potassium-40 beta particle activity must be calculated by multiplying elemental potassium concentrations in mg/L by a factor of 0.82.
TABLE 14A-CT VALUES (CT99.9) FOR 99.9 PERCENT INACTIVATION OF GIARDIA LAMBLIA CYSTS BY FREE CHLORINE AT 0.5 DEGREES CELSIUS OR LOWER1
| Free chlorine residual (mg/l) | pH | ||||||
| <=6.0 | 6.5 | 7.0 | 7.5 | 8.0 | 8.5 | <=9.0 | |
| <=0.4 | 137 | 163 | 195 | 237 | 277 | 329 | 390 |
| 0.6 | 141 | 168 | 200 | 239 | 286 | 342 | 407 |
| 0.8 | 145 | 172 | 205 | 246 | 295 | 354 | 422 |
| 1.0 | 148 | 176 | 210 | 253 | 304 | 365 | 437 |
| 1.2 | 152 | 180 | 215 | 259 | 313 | 376 | 451 |
| 1.4 | 155 | 184 | 221 | 266 | 321 | 387 | 464 |
| 1.6 | 157 | 189 | 226 | 275 | 329 | 397 | 477 |
| 1.8 | 162 | 193 | 231 | 279 | 338 | 407 | 489 |
| 2.0 | 165 | 197 | 236 | 286 | 346 | 417 | 500 |
| 2.2 | 169 | 201 | 242 | 297 | 353 | 426 | 511 |
| 2.4 | 172 | 205 | 247 | 298 | 361 | 435 | 522 |
| 2.6 | 175 | 209 | 252 | 304 | 368 | 444 | 533 |
| 2.8 | 178 | 213 | 257 | 310 | 375 | 452 | 543 |
| 3.0 | 181 | 217 | 261 | 316 | 382 | 460 | 552 |
1 These CT values achieve greater than a 99.99 percent inactivation of viruses. CT values between the indicated pH values may be determined by linear interpolation. CT values between the indicated temperatures of different tables may be determined by linear interpolation. If no interpolation is used, use the CT99.9; value at the lower temperature, and at the higher pH.
TABLE 14B-CT VALUES (CT99.9) FOR 99.9 PERCENT INACTIVATION OF GIARDIA LAMBLIA CYSTS BY FREE CHLORINE AT 5.0 DEGREES CELSIUS1
| Free chlorine residual (mg/l) | pH | ||||||
| <=6.0 | 6.5 | 7.0 | 7.5 | 8.0 | 8.5 | <=9.0 | |
| <=0.4 | 97 | 117 | 139 | 166 | 198 | 236 | 279 |
| 0.6 | 100 | 120 | 143 | 171 | 204 | 244 | 291 |
| 0.8 | 103 | 122 | 146 | 175 | 210 | 252 | 301 |
| 1.0 | 105 | 125 | 149 | 179 | 216 | 260 | 312 |
| 1.2 | 107 | 127 | 152 | 183 | 221 | 267 | 320 |
| 1.4 | 109 | 130 | 155 | 187 | 227 | 274 | 329 |
| 1.6 | 111 | 132 | 158 | 192 | 232 | 281 | 337 |
| 1.8 | 114 | 135 | 162 | 196 | 238 | 287 | 345 |
| 2.0 | 116 | 138 | 165 | 200 | 243 | 294 | 353 |
| 2.2 | 118 | 140 | 169 | 204 | 248 | 300 | 361 |
| 2.4 | 120 | 143 | 172 | 209 | 253 | 306 | 368 |
| 2.6 | 122 | 146 | 175 | 213 | 258 | 312 | 375 |
| 2.8 | 124 | 148 | 178 | 217 | 263 | 318 | 382 |
| 3.0 | 126 | 151 | 182 | 221 | 268 | 324 | 389 |
1 These CT values achieve greater than a 99.99 percent inactivation of viruses. CT values between the indicated pH values may be determined by linear interpolation. CT values between the indicated temperatures of different tables may be determined by linear interpolation. If no interpolation is used, use the CT99.9 value at the lower temperature, and at the higher pH.
TABLE 14C-CT VALUES (CT99.9) FOR 99.9 PERCENT INACTIVATION OF GIARDIA LAMBLIA CYSTS BY FREE CHLORINE AT 10.0 DEGREES CELSIUS1
| Free chlorine residual (mg/l) | pH | ||||||
| <=6.0 | 6.5 | 7.0 | 7.5 | 8.0 | 8.5 | <=9.0 | |
| <=0.4 | 73 | 88 | 104 | 125 | 149 | 177 | 209 |
| 0.6 | 75 | 90 | 107 | 128 | 153 | 183 | 218 |
| 0.8 | 78 | 92 | 110 | 131 | 158 | 189 | 226 |
| 1.0 | 79 | 94 | 112 | 134 | 162 | 195 | 234 |
| 1.2 | 80 | 95 | 114 | 137 | 166 | 200 | 240 |
| 1.4 | 82 | 98 | 116 | 140 | 170 | 206 | 247 |
| 1.6 | 83 | 99 | 119 | 144 | 174 | 211 | 253 |
| 1.8 | 86 | 101 | 122 | 147 | 179 | 215 | 259 |
| 2.0 | 87 | 104 | 124 | 150 | 182 | 221 | 265 |
| 2.2 | 89 | 105 | 127 | 153 | 186 | 225 | 271 |
| 2.4 | 90 | 107 | 129 | 157 | 190 | 230 | 276 |
| 2.6 | 92 | 110 | 131 | 160 | 194 | 234 | 281 |
| 2.8 | 93 | 111 | 134 | 163 | 197 | 239 | 287 |
| 3.0 | 95 | 113 | 137 | 166 | 201 | 243 | 292 |
1 These CT values achieve greater than a 99.99 percent inactivation of viruses. CT values between the indicated pH values may be determined by linear interpolation. CT values between the indicated temperatures of different tables may be determined by linear interpolation. If no interpolation is used, use the CT99.9 value at the lower temperature, and at the higher pH.
TABLE 14D-CT VALUES (CT99.9) FOR 99.9 PERCENT INACTIVATION OF GIARDIA LAMBLIA CYSTS BY FREE CHLORINE AT 15.0 DEGREES CELSIUS1
| Free chlorine residual (mg/l) | pH | ||||||
| <=6.0 | 6.5 | 7.0 | 7.5 | 8.0 | 8.5 | <=9.0 | |
| <=0.4 | 49 | 59 | 70 | 83 | 99 | 118 | 140 |
| 0.6 | 50 | 60 | 72 | 86 | 102 | 122 | 146 |
| 0.8 | 52 | 61 | 73 | 88 | 105 | 126 | 151 |
| 1.0 | 53 | 63 | 75 | 90 | 108 | 130 | 156 |
| 1.2 | 54 | 64 | 76 | 92 | 111 | 134 | 160 |
| 1.4 | 55 | 65 | 78 | 94 | 114 | 137 | 165 |
| 1.6 | 56 | 66 | 79 | 96 | 116 | 141 | 169 |
| 1.8 | 57 | 68 | 81 | 98 | 119 | 144 | 173 |
| 2.0 | 58 | 69 | 83 | 100 | 122 | 147 | 177 |
| 2.2 | 59 | 70 | 85 | 102 | 124 | 150 | 181 |
| 2.4 | 60 | 72 | 86 | 105 | 127 | 153 | 184 |
| 2.6 | 61 | 73 | 88 | 107 | 129 | 156 | 188 |
| 2.8 | 62 | 74 | 89 | 109 | 132 | 159 | 191 |
| 3.0 | 63 | 76 | 91 | 111 | 134 | 162 | 195 |
1 These CT values achieve greater than a 99.99 percent inactivation of viruses. CT values between the indicated pH values may be determined by linear interpolation. CT values between the indicated temperatures of different tables may be determined by linear interpolation. If no interpolation is used, use the CT99.9 value at the lower temperature, and at the higher pH.
TABLE 14E-CT VALUES (CT99.9) FOR 99.9 PERCENT INACTIVATION OF GIARDIA LAMBLIA CYSTS BY FREE CHLORINE AT 20.0 DEGREES CELSIUS 1
| Free chlorine residual (mg/l) | pH | ||||||
| <=6.0 | 6.5 | 7.0 | 7.5 | 8.0 | 8.5 | <=9.0 | |
| <=0.4 | 36 | 44 | 52 | 62 | 74 | 89 | 105 |
| 0.6 | 38 | 45 | 54 | 64 | 77 | 92 | 109 |
| 0.8 | 39 | 46 | 55 | 66 | 79 | 95 | 113 |
| 1.0 | 39 | 47 | 56 | 67 | 81 | 98 | 117 |
| 1.2 | 40 | 48 | 57 | 69 | 83 | 100 | 120 |
| 1.4 | 41 | 49 | 58 | 70 | 85 | 103 | 123 |
| 1.6 | 42 | 50 | 59 | 72 | 87 | 105 | 126 |
| 1.8 | 43 | 51 | 61 | 74 | 89 | 108 | 129 |
| 2.0 | 44 | 52 | 62 | 75 | 91 | 110 | 132 |
| 2.2 | 44 | 53 | 63 | 77 | 93 | 113 | 135 |
| 2.4 | 45 | 54 | 65 | 78 | 95 | 115 | 138 |
| 2.6 | 46 | 55 | 66 | 80 | 97 | 117 | 141 |
| 2.8 | 47 | 56 | 67 | 81 | 99 | 119 | 143 |
| 3.0 | 47 | 57 | 68 | 83 | 101 | 122 | 146 |
1 These CT values achieve greater than a 99.99 percent inactivation of viruses. CT values between the indicated PH values may be determined by linear interpolation. CT values between the indicated temperatures of different tables may be determined by linear interpolation. If no interpolation is used, use the CT99.9 value at the lower temperature, and at the higher pH.
TABLE 14F-CT VALUES (CT99.9) FOR 99.9 PERCENT INACTIVATION OF GIARDIA LAMBLIA CYSTS BY FREE CHLORINE AT 25.0 DEGREES CELSIUS AND HIGHER1
| Free chlorine residual (mg/l) | pH | ||||||
| <=6.0 | 6.5 | 7.0 | 7.5 | 8.0 | 8.5 | <=9.0 | |
| <=0.4 | 24 | 29 | 35 | 42 | 50 | 59 | 70 |
| 0.6 | 25 | 30 | 36 | 43 | 51 | 61 | 73 |
| 0.8 | 26 | 31 | 37 | 44 | 53 | 63 | 75 |
| 1.0 | 26 | 31 | 37 | 45 | 54 | 65 | 78 |
| 1.2 | 27 | 32 | 38 | 46 | 55 | 67 | 80 |
| 1.4 | 27 | 33 | 39 | 47 | 57 | 69 | 82 |
| 1.6 | 28 | 33 | 40 | 48 | 58 | 70 | 84 |
| 1.8 | 29 | 34 | 41 | 49 | 60 | 72 | 86 |
| 2.0 | 29 | 35 | 41 | 50 | 61 | 74 | 88 |
| 2.2 | 30 | 35 | 42 | 51 | 62 | 75 | 90 |
| 2.4 | 30 | 36 | 43 | 52 | 63 | 77 | 92 |
| 2.6 | 31 | 37 | 44 | 53 | 65 | 78 | 94 |
| 2.8 | 31 | 37 | 45 | 54 | 66 | 80 | 96 |
| 3.0 | 32 | 38 | 46 | 55 | 67 | 81 | 97 |
1 These CT values achieve greater than a 99.99 percent inactivation of viruses. CT values between the indicated pH values may be determined by linear interpolation CT values between the indicated temperatures of different tables may be determined by linear interpolation If no interpolation is used, use the CT99.9 value at the lower temperature, and at the higher pH.
TABLE 14G-CT VALUES (CT99.9) FOR 99.9 PERCENT INACTIVATION OF GIARDIA LAMBLIA CYSTS BY CHLORINE DIOXIDE AND OZONE1, 2
| Degrees Celsius | ||||||
| <=1 | 5 | 10 | 15 | 20 | >=25 | |
| Chlorine dioxide | 63 | 26 | 23 | 19 | 15 | 11 |
| Ozone | 2.9 | 1.9 | 1.4 | 0.95 | 0.72 | 0.48 |
1 These CT values achieve greater than a 99.99 percent inactivation of viruses. CT values between the indicated temperatures may be determined by linear interpolation. If no interpolation is used, use the CT99.9 value at the lower temperature for determining CT99.9 values between indicated temperatures.
2 The use of these alternative disinfectants shall be approved in accordance with the provisions of section 5-1.22 of this Subpart.
TABLE 15-ENTRY POINT DISINFECTANT MONITORING FREQUENCY FOR SYSTEMS USING CHEMICAL DISINFECTION1
| Water system source type | Population served | Samples per day4 |
| Surface water or ground water under the direct influence of surface water (GWUDI)2,3 | Up to 500 501 - 1,000 1,001 - 2,500 2,501 - 3,300 > 3,300 | 1 2 3 4 Continuous monitoring required5 |
| Ground water system or ground water source required to provide 4-log virus treatment and process compliance monitoring6,7,8 | <=3,300 > 3,300 | 19 Continuous monitoring required5 |
| Ground Water System or ground water source with other than 4-log virus treatment | Any | 19 |
1 See also Table 15A for distribution system disinfectant residual sampling locations and frequency depending on disinfectant used.
2 If at any time chlorine residual concentration falls below 0.2 mg/L at the entry point for a surface water or GWUDI system, the system must collect and analyze a grab sample every four hours until the chlorine residual concentration is again equal to or greater than 0.2 mg/L.
3 Entry point samples collected at Surface Water or GWUDI systems.
4 The day's grab samples may not be conducted at the same time.
5 If there is a failure in the continuous monitoring equipment, grab samples, every four hours, may be conducted in lieu of continuous monitoring, but for no more than five working days (14 working days for ground water systems) following the failure of the equipment.
6 If at any time the disinfectant concentration at a ground water system falls below the minimum required in the process compliance monitoring plan approved by the State, the system must collect and analyze a grab sample every four hours until the disinfectant residual concentration is again at or above minimum required levels, without exceeding other applicable concentration requirements in Table 3A.
7 Any ground water system required to provide 4-log virus treatment because of fecal contamination of the source or because of significant deficiencies in system operation, and using chemical disinfection, must demonstrate minimum disinfectant residual at a location that demonstrates adequate concentration to provide the required treatment at the first customer during peak flow according to the sampling plan developed for the system. These samples to confirm the minimum disinfection residual are to be collected at the frequency in this table.
8 Lowest daily concentration must be recorded on operation report.
9 A minimum of one disinfectant residual concentration must be recorded on operation report every day.
TABLE 15A-DISINFECTANT RESIDUAL MINIMUM DISTRIBUTION SYSTEM MONITORING REQUIREMENTS FOR SYSTEMS USING CHEMICAL DISINFECTION
| Disinfectant | Type of water system | Routine monitoring |
| Chlorine | Community and nontransient | Sample at the same time and same points in |
| Chloramines | noncommunity | the distribution system as total coliform |
| sampling.1 | ||
| Chlorine dioxide2 | Community, nontransient | Daily sample at the entrance to the |
| noncommunity and transient | distribution system3 | |
| noncommunity |
1 Community Water Systems using surface water or ground water under the direct influence of surface water may use heterotrophic plate count results of equal to or less than 500 colonies per milliliter as equivalent to a free chlorine residual as outlined in table 11, footnote 5, in lieu of taking separate samples for disinfection residuals.
2 Monitoring is required if chlorine dioxide is used for either oxidation or disinfection.
3 If the Maximum Residual Disinfectant Level (MRDL) of 0.8 mg/L is exceeded, the system must take three samples in the distribution system on the following day. If chlorine dioxide or chloramines are used to maintain a disinfectant residual in the distribution system, or if chlorine is used and there are no rechlorination stations, the system must take three samples as close to the first customer as possible, at intervals of at least six hours. If chlorine is used and there is a rechlorination station, the system must take one sample as close to the first customer as possible, one sample representing average residence time, and one sample representing maximum residence time.
TABLE 16-ADDITIONAL CONTAMINANTS FOR WHICH REPORTING IS REQUIRED PURSUANT TO SECTION 5-1.72(e)-(h) OF THIS SUBPART
Contaminant name
2,4-dinitrotoluene
2,6-dinitrotoluene
DCPA monoacid
DCPA di acid
4.4'-DDE
EPTC
Molinate
MTBE
Nitrobenzene
Terbacil
Acetochlor
Perchlorate
Diuron
Linuron
Proneton
2,4,6-trichlorophenol
2,4-dichlorophenol
2,4-dinitrophenol
2-methyl-1-phenol
Alachlor ESA
1,2-diphenylhydrazine
Diazinon
Disulfoton
Fonofos
Terbufos
Aeromonas Hydrophilia
Polonium-210
RDX
Algae and toxins
Echoviruses
Coxsackie viruses
Helicobacter pylori
Microsporidia
Caliciviruses
Adenoviruses
Lead - 210
Napthalene
TABLE 17-INFORMATION COLLECTION RULE CONTAMINANT
REPORTING REQUIREMENTS
| Contaminant | Reporting requirements for finished water |
| Total Trihalomethanes (chloroform, bronodichloromethane, dibronochloromethane, and bronoform) | Report as a group if detected |
| Haleocetic acids (mono-,di-,and trichloroacetic acid, and mono- and di-bronoacetic acid) | Report as a group if detected |
| Haloacetilenitriles (dichloro-,trichloro-,bromochloro-, and dibromoacetonitrile) | Report as a group if detected |
| Haloketones (1,1-dichloropropanone and 1,1,1-trichloropropanine) | Report as a group if detected |
| Chloropicrin | Reporting required if detected |
| Chloral Hydrate | Reporting required if detected |
| Total Organic Halides | Reporting required if detected |
| Disinfectant residual | Reporting required if detected |
| Cyanogen Chloride | Report if detected and treatment plant uses Chloramines |
| Chlorate | Report if detected and treatment plant uses Hypochlorite solutions |
| Bromate, Aldehydes | Report if detected and treatment plant uses Ozone |
| Chlorine Dioxide residual, Chlorite, Chlorate, Bromate, Aldehydes | Report if detected and treatment plant uses Chlorine Dioxide |
| Total coliforms | Report if detected |
| Fecal coliforms or Escherichia coli | Report if detected |
| Gardia | Report if detected |
| Total culturable viruses | Report if detected |
N.Y. Comp. Codes R. & Regs. Tit. 10 § 5-1.52